RSSI (Received Signal Strength Indicator): It is average power over certain OFDM symbols in a measurement bandwidth corresponding to the channel bandwidth.

SS-SINR (Secondary Synchronization Signal – Signal to Interference Noise power): it is SS-RSRP over average noise plus interference power.

SS-RSRQ (Secondary Synchronization Signal- Reference Signal Received Quality): it is the quality of the signal received and it is measured over the same resource block.

SS-RSRPB: it is similar to SS-RSRP but for each antenna connector or for each receiver branch.

In this, resource elements of PBCH-DMRS and CSI-RS can be included.

SS-RSRP (Secondary Synchronization Signal- Reference Signal Received Power): It is the average power of the resource elements carrying secondary synchronization signals.

CSI-RS (Channel State Information – Reference Signal): It is used for tracking rapidly changing channel conditions to support mobility and beam management.

SSB measurements are used to determine path loss and average channel quality.

SSB (Synchronization Signal Block): It is transmitted with a low duty cycle on a limited bandwidth as compared to LTE’s Cell-specific Reference signals (CRS) that are sent on the entire channel bandwidth.

For downlink channel sounding, 5G NR uses two main downlink signals that a UE measures The UE measures many different signals, the main ones are based on the SSB and CSI-RS. Some measurements are reported by layer 1 directly to the network. If the filtered measurements meet reporting criteria, they are reported to the network. RRC does filtering on layer 1 measurements. Most measurements are executed by Layer 1, although some are at layer 2.

RRC (Radio Resource Control) manages measurement configurations. It is possible for a UE to measure uplink signals sent by other UE’s. A UE measures downlink signals while a network measures uplink signals. Measurements are done by the UE and the Network.

Measurements help the UE and the network make decisions so that the resources are managed better and with this, the quality of service is achieved. Measurements are essential to determine the health of any cellular system given the current configuration.

Rsrp 5g